Gin saw gummer and filer



June 29, 1937. A. P. WOOD ET AL GIN SAW GUMMER AND FILER Filed Fep 27, 1936 2 Sheets-Sheet l 17F W500 mm J W 52 01257 nnnnnnnn n. V v

June 29, 1937. A. P. WOOD ET AL 2,085,350

GIN SAW 3UMMER AND FILER Filed Feb. 27, 1936 2 Sheets-Sheet 2 HIP W Y 40 gmcm Gummy! ?aten :ed June 29,

FECE

GEN SAW GUR'ZM AND FILER Application 9 Claims.

This invention relates to gin saw sharpening machines and it is an improvement upon the invention disclosed in Patent No. 1,203,443, granted to Albert A. Wood, on October 31, 1916.

The present invention has for its general object to provide a gin saw gummer of that type which is adapted to be placed in operative relation with a gang of gin saws and shifted from one saw to another and embodying simple and substantially 1' fool-proof means for adjusting the gummer to its proper cutting position regardless of the diameter of the spacing blocks which support the gummer or the diameter of the saw.

Another object of the invention is the provision in a gin saw gummer of rotary side files operating simultaneous with the gummer file for removing the bur raised by the gummer file, as well as bevelling the sides of the saw teeth.

Other objects of the invention will appear as the following description of a preferred and practical embodiment thereof proceeds.

In the drawings which accompany and form a part of the following specification and throughout the several figures of which the same characters of reference have been employed to designate identical parts:

Figure 1 is a side elevation of a portion of a gin saw gummer illustrating the adjustment fea- 'ture of the present invention;

' Figure 2 is a cross section taken along the line 22 of Figure 1;

Figure 3 is a perspective view of one of the pair ,of adjusting plates;

Figure 4 is a view in elevation of an adjusting g plate and that portion of the main frame of the gummer to which it attaches illustrating the relation of the rows or" adjusting holes in the respec- ;tive members;

7 Figure 5 is a side elevation illustrating the 4 swinging mounting of the side files in the position assumed when the side files are in operative relaltion to the saw teeth;

Figure 6 is a similar view, parts being omitted showing the swinging mounting in the position in which the files are in inactive position;

Figure 7 is a section taken along the line '.'-'i of Figure 6;

Figure 8 is a bent section taken along the line 8-8 of Figure 5;

Figure 9 is a side elevation of one of the side files; and

Figure 10 is a side elevation, somewhat diagrammatic showing the saw gin gummer in operative relation to a gang of gin saws.

Referring now in detail to the several figures,

eeruary 27, 1936, Serial No. (36,133"

the improved gin saw gummer forming he subject matter of this application is designed to be used on a conventional gin saw unit such as is illustrated in Figure 2, in which the gin saws i are mounted in parallel relation on an arbor 2, spaced apart by the space blocks 3 and the assemblage held in tight, rigid relation upon the arbor by the end plate 4 against which the nut 5 is tightly screwed. Figure 10 shows the gummer in operative position, resting upon the space blocks and receiving auxiliary support from a leg resting upon the floor or ground.

The gummer comprises a main frame El, the lower portion of which is bifurcated as shown at 9 and iii in Figure 2, adapting the main leg to straddle the saw. A mounting l I is carried by the main leg upon which is mounted the rotatable shaft !2 for the gummer file 53 which shapes the inter-dental spaces, and a pawl M which by ongagement with the teeth of the gin saw advances M the saw a tooth at a time into grinding relation with respect to the gummer file i3.

In the gin saw gummer disclosed in the aforementioned patent, it was proposed to place the gummer in position by having the leg bifurcations Q and i9 straddle the saw until the file gummer !3 or the pawl Hi rests upon the edge of the saw. Since saws vary in diameter, it was a question of mere chance of whether or not the gummer would rest upon the space blocks when the filo or feed device rested upon the teeth. In most every instance the gummer would not be resting upon the space blocks. It is absolutely essential that the gummer should rest upon the space blocks because they afford a datum from which to measure the depth of the cut of the gummer file E3 in the interdental spaces. Consequently, in the machine disclosed in the said patent, if, when the gummer file or feed was resting upon the saw teeth the bifurcations 9 and IQ were not resting upon the space blocks, it became necessary to loosen the mounting l l with respect to the main leg 8 and to shift the mounting so as to raise the gummer file or feed pawl until the bifurcations 9 and i9 actually rested upon the space blocks, while the gum-- mer file or feed was in contact with the teeth of the saw. This is a difficult adjustment to make, due to the weight of the parts and for other reasons and could not ordinarily be successfully done by the inexpert help customarily employed around cotton gins.

The present invention obviates the necessity of adjusting the mounting of the gummer file and feed by providing adjustable foot plates 15 and 16, on the outer sides of the bifurcations 9 and Ill it. When the gummer is placed astride the saw and it is found that the foot plates are not in contact with the space blocks, the foot plates are loosened and adjusted down to a position in which they are in contact with the space blocks. This adjustment is accomplished without altering the angle of out of the gummer file I3, that is to say, without altering the pitch of the teeth of the saw.

The foot plates are constructed to follow the scientific principle that the edge of the gummer file I3 at the point at which it contacts the base of a tooth shall always be in the radius ab from the axis of the arbor 2. The foot plates are formed as angularly disposed wings ll and 58, preferably lying in the same plane and having a re-entrant contour on the under side represented by the faces I9 and 29 which if produced so as to intersect the radius ab would form an angle which is bisected by said radius. It is obvious that if the space blocks be smaller than normal the foot plates must be adjusted closer to the axis of the arbor in order to make contact with the space blocks and if the space blocks are larger than normal the foot plates must be adjusted farther from the axis of the arbor in order to rest upon the space blocks.

Each of the wings El and i8 is provided with a row of holes 2! and 22 near its upper edge, any of which holes are designed selectively to be brought into registry with a hole in the corresponding rows of holes 23 and 24 formed in the bifurcations 9 and it. The rows of holes 2! and 23 as well as the rows of holes 22 and 2 3 are arranged symmetrically with respect to the radius ab and therefore the angles which they form are likewise bisected by the radius ab. The holes in the series 2| and 23, also 22 and 2d are so disposed that lines drawn through the centers of corresponding holes in said series lie parallel tothe radius ab from which it follows that when the foot plates are shifted in the direction of the radius ab, holes in the foot plates will register with corresponding holes in the bifurcations. If the rows of holes 2! and 22 were parallel respectively tothe rows of holes 23 and 26 there would obviously be but one adjustment. However, as will be observed in Figure 4, the rows of holes in the foot plates are arranged at a small angle with respect to the rows of holes in the bifurcations. This arrangement causes only one pair of holes at a time on each wing of the foot plate to register with corresponding holes in the bifurcations. The more nearly parallel the two sets of holes become, the finer will be the adjustment and the contrary likewise follows if the respective rows of holes are arranged at a relatively great angle.

In practice, to set the gummer to any diameter of saw blade and any diameter of space block, it is necessary merely to measure the radial distance from the space block to the edge of the saw and refer to a table in which is given the proper hole in each series 2| and 22, for that distance. However, in the absence of this table, the proper adjustment of the foot plates can be accomplished by the method of trial, as follows:

The workman places the apparatus relative to the gin saw unit, as indicated in Figures 2 and 10, astride the first saw. If the saw is of a diameter to exceed the adjustment for which the gummer is originally set, the foot plates 15 and !6, only one of which can be observed by the workman in view of its exposed position, will fall short of resting upon the space blocks 3. The workman will then remove the screw 25 from each wing of the outside foot plate and bring the foot plate to rest against the outer space block. He will then move the foot plate circumferentially back and forth until one of the holes of the series 2! or 22 registers with one of the holes in series 23 or 24. Due to the symmetrical arrangement of the holes with respect to the radius ab, a corresponding pair of holes on both sides of the foot plate will come into registry at the same time. The screws 25 are then reinserted. The gummer is then removed from the gin saw unit so as to make the other foot plate it accessible for adjustment and the said foot plate is adjusted to a position pre cisely similar to that of the one first adjusted. The gummer is then replaced astride of the first saw and the bifurcated movable jaw 26 of the auxiliary arm 21 is pushed into place against the underside of the space blocks by means such as the toggle 253. The height of the leg 1 does not matter. Regardless of the angle at which the gummer approaches the space blocks, it will always rest with both faces 19 and 29 of the foot plates tangent to the circumference of the face blocks. Of course, it may happen that any one of the several steps of adjustment provided by the series of selectively registrable holes will not bring the foot plates 95 and i6 precisely in contact with the space blocks. In such case the next hole on each side is chosen, setting the foot plates to a greater depth and the consequent slight floating of the gummer file shaft will make no appreciable change in the angle of the front of the tooth to the saw radius. The above is substantially a fool-proof adjustment which can be performed by inexpert labor since there are only two holes which will come into registry simultaneously and when this position of the foot plates is thus determined, there can be no mistake.

It will be understood from the text of the Wood patent hereinbefore mentioned, and it will be inferred from the structure disclosed in the present application, that the gummer operates automatically by advancing the saw step by step through the instrumentality of the feeding pawl M, the gummer file l3 lifting from and descending into the inter-dental spaces as they successively come into its path of operation.

It will be understood that the glimmer file works transversely of the teeth and leaves a lateral bur which it is desirable to remove. The present invention concerns itself with the provision of mechanism for removing this bur as well as bevelling the sides of the teeth. This is done by rotary side files 2t and 29 which operate on opposite sides of the peripheral margin of the saw. The filing mechanism is mounted upon a rigid arm 35 bolted or otherwise secured to the main frame 8 of the glimmer. lhe lower end of the arm 30 is provided with a bearing 3! receiving a journal 32 having a sprocket 33 on one end and a broad pinion 34- at its other end. The sprocket is suitably driven as by the chain 35 from the same motor 35, Figure 10, which operates the gummer and thus provides driving means for the lateral files operable simultaneously with the gurnmer. Aswinging sector 37 is pivoted about the journal 32 in free relation with respect thereto, said sector having a bearing 38 carrying the file chuck shaft 39. A pinion 4U suitably keyed to the chuck shaft is in mesh with the pinion 34 and thus the driving power is transmitted to the chuck shaft. Pins 4| project from the surface of a seat 42 formed in the face of the pinion ii). The teeth of the rotary side files are arranged in annular formation and the toothed face is bevelled toward the periphery of the file. The rotary side files 28 are provided with holes 29' adapted to receive the pins 4| when a rotary side file 28 is pushed on to said pins and into the recess on the face of the pinion. A second file is pushed on to the pins 4| and a thrust plate :3 having a recess forming a seat for a second rotary side file is placed upon the shaft 39 in reciprocable relation upon the pins 4|. A spring M and nut 45 provide regulable tension for the rotary side files.

The swinging sector 37 has a lug 56, see Figure 6, and an adjustable spring 4'! which biases the sector toward the saw so that normally the rotary side files will be pressed sawwards with a pressure equal to the tension of the spring 41. This tension is of such value that when the saw teeth contact the rotary side files in their plane of separation, said files will spread against the tension of the spring 14 and let the saw teeth in. When it is desired not to operate the lateral filing mechanism the sector is pulled away from the saw by hand, in the direction of the arrow in Fig ure 6. When in fully retracted position, a weighted latch 38 drops in. front of a shoulder 49 formed on the sector. The latch is pivotally secured to an extension 50 of the rigid arm 30 by means of a pin 5| which plays in a slot 52 formed in said sector. A set screw 53 comes into contact with the extension 53 when the sector swings forward, thus determining the depth to which theperiphery of the saw shall be subjected to the action of the rotary side files.

It will be observed that the chuck shaft 39 is slidable in the bearing 38 so that it may be moved laterally. The object of this mobility is to enable the rotary side files to be shifted to the last saw being gummed so that all the saws will be automatically laterally tapered and deburred. In this connection, it may be explained that in the operation of filing a cylinder of saws, the first saw, which is the left hand one as you face the gin, is first gummed only and then while the second saw is being gummed the rotary side files are put in position to side file this first saw, which places them in operation throughout the entire gang of saws on the saw, thus previously gummed. This provides that both the gumming and filing shall proceed completely around each saw. When the last saw, that is to say, the right hand one is reached these side files must necessarily be moved so as to operate on the saw then being gummed. This leaves a burred gap equal to the are between the operating point of the gummer and the operating point of the side files,

but gumrned completely around. This small gap is then deburred with a hand file.

It is obvious that the adjustment of the foot plates l5 and it moves the gummer bodily in a path parallel to the radius ab. Thus the foot plates become an adjustment for the lateral files as well as for the file which treats the interdental spaces.

It will be obvious to those skilled in the art that the invention is not to be construed as limited to the specific details of construction as shown and described and which are merely an exemplary embodiment of the invention and that the specific construction of the several elements and the precise manner in which they react are not to be construed as limiting the scope of the invention as claimed.

What we claim is:

1. In a gin saw gumming machine of that type having a file for shaping the inter-dental spaces, a feed for rotating 'ie saw step by step to bring successive teeth into operative relation to the file, and a frame adapted to be supported by the space blocks between the saws, using them as a datum from which to maintain the file in a precise working position, an adjustable plate forming a frame extension permitting said frame to be lengthened or shortened to engage said space blocks regardless of the diameters of the saws or space blocks, said plate intersecting a radial line from the axis of rotation of said saw to a point at the depth limit of said file, said plate and the portion of the frame with which it cooperates having groups of holes on opposite sides of said radial line and symmetrically positioned with respect to said line, the holes in the plate on one side of said line, when said plate is shifted toward or from said space blocks, being selectively registrable one by one with corresponding holes in said frame, for receiving securing means, the holes on the opposite side of said line in both said plate and frame being so placed as, when two of them are brought into registry, while the other side of said plate is secured, to determine a position of said plate in which it has the same bi-lateral relation to said radial line as in any other position of adjustment.

2. In a gin saw gumming machine of that type having a file for shaping the inter-dental spaces, a feed for rotating the saw step by step to bring successive teeth into operative relation to the file, and a frame adapted to be supported by the space blocks between the saws, using them as a datum from which to maintain the file in a precise working position, an adjustable plate forming a frame extension permitting said frame to be lengthened or shortened to engage said space blocks regardless of the diameters of the saws or space blocks, said plate having an indented edge adapted to partially embrace said space blocks and engage said blocks at spaced points, said plate intersecting a radial line from the axis of rotation of said saw to a point at the depth limit of said fiie, said plate and the portion or the frame with which it cooperates having groups of holes on opposite sides of said radial line and symmetrically positioned with respect to said line, the holes in the plate on one side of said line when said plate is shifted toward or from said space blocks, being selectively registrable one by one with corresponding holes in said frame, securing means insertable in said registering holes, the holes on the opposite side of said line in both said plate and frame being so placed as, when two of them are brought into registry, while the other side of said plate is secured, to determine a position of said plate in which it has the same bilateral relation to said radial line as in any other position of adjustment.

3. In a gin saw gumming machine of that type having a file for shaping the inter-dental spaces, a feed for rotating the saw step by step to bring successive teeth into operative relation to the file, and a frame adapted to be supported by the space blocks between the saws, using them as a datum from which to maintain the file in a precise working position, an adjustable plate forming a frame extension permitting said frame to be lengthened or shortened to engage said space blocks regardless of the diameters of the saws or the space blocks, said plate intersecting a radial line from the axis of rotation of said saw to a point at the depth limit of said file and having its lower side formed with an indent adapted to partially embrace said space blocks and having straight portions. tangent to said space blocks at points on opposite sides of said line, said plate and the portion of the frame with which it cooperates having rectilinear series of holes on opposite sides of said radial line and symmetrically positioned with respect to said line, said line: being the bisector of the angle formed by lines produced passing through the centers of the holes of said series, the series in the plate on both sides of said line being angularly displaced with respect to the corresponding series of cooperating holes in said frame whereby the holes in the plate on one side of said line when said plate is shifted toward or from said space blocks are selectively registrable one by one with corresponding holes in said frame, securing means adapted to be inserted in registering holes, the holes on the opposite side of said line in both said plate and frame being so placed as, when two of them are brought into registry while the other side of said plate is secured, to determine a position of said plate in which it has the same bi-lateral relation to said radial line as in any other position of ad justment.

4. In a gin saw gumming machine of that type having a fie for shaping the inter-dental spaces, a feed for rotating the saw step by step to bring successive teeth into operative relation to the file, and a frame bifurcated so as to adapt it tostraddle a saw to be supported by the space blocks at the side of the saw, using them as a datum from which to maintain the file in a precise working position, adjustable plates forming extensions for the bifurcations of said frame permitting said frame to be lengthened or shortened to engage said space blocks regardless of the diameter of the straddled saw or the diameter of the adjacent space blocks, said plates intersecting a radial line from the axis of rotation of said saw to a point at the depth limit of said file, each plate having its lower side formed with an indent adapted to partially embrace the adjacent block and engaging said block at points on opposite sides of said line, each plate and the portion of the frame with which it cooperates having groups of holes on opposite sides of said radial line and symmetrically positioned with respect to said line, the holes in the plate on one side of said line when said plate is shifted toward or from said space a position of said plate in which it has the same" bi-lateral relation to said radial line as in any other position of adjustment.

5. In a gin saw gumming machine of that type having a file for shaping the inter-dental spaces, a feed for rotating the saw step by step to bring successive teeth into operative relation to the file, and a frame bifurcated so as to adapt it to straddle a saw and be sup-ported by the space blocks at the sides of the saw, using them as a datum from which to maintain the file in a precise working position, a bur filer operating upon said saw at a point angularly displaced with respect to the gumming file comprising a drive shaft supported by said frame, a drive element on said shaft connected in driving relation to said gummer, a hanger swingable about the axis of said shaft, a driven shaft mounted in said hanger and driven from said drive element, disk files rotatable with said shaft normally contacting face to face under 5 spring pressure, and means for biasing said hanger sawwards for forcing said files in their plane of separation against the straddled saw whereby the latter enters between the working faces of said files.

6. In a gin saw gumming machine as claimed in claim 5, means on said hanger for determining the depth of penetration of the saw between said files.

'7. Gin saw gumming machine as claimed in claim 5, including means carried by said hanger for determining the depth of penetration of said saw between the working faces of said files, and means for latching said hanger in inoperative position.

8. In a gin saw guinming machine as claimed in claim 5, said driven shaft being slidable axially in said hanger to bring the plane of separation of said files into juxta-position to the saw teeth, and said drive element comprising a gear meshing with a gear on said driven shaft and having a breadth equal to the range of sliding movement of said drive-n shaft.

9. In a. gin saw gumming machine as claimed in claim 5, including a gear on the driven shaft meshing with the said element on said drive shaft, pins projecting from said gear, a removable thrust plate sliding upon said pins, a spring with adjustable tension biasing said thrust plate toward said gear, said disk files being perforated and mounted on said pins between said thrust plate and gear, said driven shaft being slidable axially for bringing the platen of separation of said files into line with the teeth of a saw when the latter is operatively positioned with respect to said gumming machine, the element on said drive shaft being sufficiently wide to maintain operative contact with said gear throughout the range of sliding movement of said driven shaft.

ALBERT P. WOOD. JOHN W. STONEY. 

